The Sync Subtitles lets you shift or rescale subtitle timings directly in your web browser. Your file is processed on your device and never uploaded, so it stays completely private. It's free, needs no sign-up and works on any device.
How to use the Sync Subtitles
- Upload your subtitle file to the Sync Subtitles.
- Enter how many seconds to shift the subtitles (and a speed scale if needed).
- Click Process.
- Download the re-synced subtitle file.
Why use this tool?
- 100% private — your files are processed on your device and never uploaded.
- Free & unlimited — no sign-up, no watermarks, no daily caps.
- Works everywhere — any modern browser on desktop, tablet or phone.
- Fast — no waiting for uploads or downloads from a server.
Also known as
sync subtitles, sync subtitles online, sync subtitles free, free sync subtitles.
Frequently asked questions
Is the Sync Subtitles free?
Yes. Every DigiToolkit media tool is completely free, with no sign-up and no watermarks.
Are my files uploaded to a server?
No. The sync subtitles runs entirely in your browser. Your files never leave your device, which keeps them private.
Do I need to install anything?
No. The sync subtitles works in any modern browser on desktop or mobile — nothing to download or install.
Which subtitle formats are supported?
SubRip (.srt), WebVTT (.vtt), Advanced SubStation Alpha (.ass) and SubStation Alpha (.ssa), plus plain text (.txt).
Will my timings stay accurate?
Yes. Timestamps are parsed precisely to the millisecond and converted without rounding errors.
Does it work on mobile?
Yes, it is mobile-friendly and works on phones, tablets and desktops.